GEOLOGY, REMOTE SENSING AND GEOPHYSICAL STUDIES OF ATSHAN AREA, SOUTH EASTERN DESERT, EGYPT.

Document Type : Original Article

Authors

1 Senior geophysicist Egyptian Mineral Resources Authority, Cairo, Egypt.

2 Geology Department, Faculty of Science, Al-Azhar University, Egypt.

3 National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt

4 geology department, faculty of science, al azhar university

Abstract

In this study we focusing on the occurrences of mineralized zones, which are composed of metavolcanic rocks (metarhyolite, metaandesite, and metebasalt), to explore sulfide mineralization and its gold related of them. To achieve this target, we applied various methods such as: remote sensing analyses, processing and interpretation, magnetic measurements, and correction, self-potential (SP) and 2D geoelectrical profiles to outline the mineral resources in depths and extensions which there are in the structural control (faults and shearing zones). The processing and interpretation of magnetic measurements were done by using several methods; such as Reduced to the northern pole(RTP), low-pass (regional) and band -pass magnetic maps using the (Geosoft Oasis Montag-2015) program, the results indicated that high magnetic potentialities (up to 41563 nT) are concentrated in the central, southeastern and southwestern parts, these high magnetic anomalies correspond to metavolcanic rocks and the delineating depths may be range from range from 5 to 30 m. The SP show negative anomalies occupy the high stain zones (mainly silicified and alterations zones). Also, the low-SP zones coincide with other geophysical anomalies and geological signature of metavolcanics rocks cropping out in the study area. Two resistivity/IP -Wenner- Schlumberger Arrays were carried out and the results show that there are zones have chargeability and conductivity.

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